When you insert an Excel spreadsheet into your presentation, it becomes an OLE embedded object. If you change the theme (colors, fonts, and effects) of your presentation, the theme does not update the spreadsheet you inserted from Excel. You also won't be able to edit the table by using options in PowerPoint.

Select the slide that you want to insert an Excel spreadsheet into.

Go to Insert >Table, and then choose Excel Spreadsheet.

To add text to a table cell, click the cell, and then enter your text.

After you enter your text, click outside the table.

Tip: To edit the Excel spreadsheet after you have deselected it, double-click the table.

After you add a table to your presentation, you can use the table tools in PowerPoint to make formatting, style, or other types of changes to the table. To learn how to edit what you added to your PowerPoint presentation, see Change the look of a table.